Polishing-machine.



A. G. FERRARINI.

POLISHING MACHINE.

APPLICATION FILED MAR. I9, I9I5.

Patented Apr. 25, 1916.

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2% A TTOH A. G. FERBARINI. POLISHING MACHINE.

APPLICATION FILED MAIL-l9, 191s.

Patented Apr. 25, 1916.

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ANTONIO Cr. FEE" F'I RINI, OF CHICAGO, ILLINOIS, ASSIG-NOR 01F ONE-HALFTO CHICAGO ILLINOIS.

POLISHING-MACHINE.

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Specification of Letters Patent.

Patented Apr. 25, 1913.

Application filed March 19, 1915. Serial No. 15,495.

To all whom it may concern Be it known that I, ANTONIO Gr. FER- RARINI,a citizen of the United States, residing at Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Polishing-Ma chines, of which the following is aspecification.

My invention relates to polishing or surfacing apparatus, and theprincipal ob ect of the invention is to provide a simple and inexpensivemachine for polishing r surfacing the walls or wainscoting of buildings,particularly walls or wainscoting made of or faced with terrazzo,concrete, -mosaic work, or other like material.

A further object is to provide a machine of this sort consisting of apolishing tool, a motor, and a flexible shaft driven by the motor onwhich the tool is supported, whereby the tool may be moved over a veryconsiderable areaand turned in whatever posi- Figure 1 is a sideelevation of the ma chine, Fig. 2, a longitudinal sectional view takenthrough the tool holding shank and the outer end of the flexible shaft,and Fig. 3, a cross sectional view on line 3-3 of s Fig. 2.

Like characters of reference designate like parts in the several figuresof the draw- 1ns.

eferring. to the drawings, designates a platform which is preferablymounted on wheels 11.

12 is a motor, of any desired type, supported on the platform 10. I haveshown an electric motor but any other motor might be employed.

13 is a shaft mounted in brackets 14 on a framework 15 carried on theplatform 10.

The polishing or surfacing tool consists preferably of a generallycylindrical body of carborundum or other suitable material 16, the outerend of which isrounded, as indicated at 17; the end being roundedparticularly so that it will fit into the rounded surface or cove base19 which frequently intervenes between the floor 20 and side wall 21 ofa building. The surfacing tool is secured to a hollow tool-carryingelement 22 through which extends a shaft 23. The tool is clamped betweena boss 24 on the tool-carrying element 22, and a washer 25 and nut 26 onthe end of shaft 23, the nut and washer being located in a recess 27 inthe end of the tool. Preferably a lead bushing 22 intervenes between thetool-carrying element 22 and the tool, this bushing affording a tightfit between the tool and the carrying element. The latter is rigid withshaft 23. i

The shaft 23 turns in ball bearings 28 in a casing 29, the bearingsbeing located in heads 30, 31, forming part of the casing 29.

,To the outside of the latter is secured, by

means of screws 32, a strip 33 having an offset projection 34 extendingbeyond the casingadjacent the surfacing tool 16. To the strip 33, 34 aresecured studs 35 on which are arranged hand grips 36 held on the studsby nuts 37 and formed with recesses 38 for spiral springs 39. The toolcarrying shaft 23 is driven in any suitable manner from shaft 13, forexample, by flexible shafting consisting of shaft sections 10, 4:1,inclosed in hinged casings 42,43, and connected to each other and withshaft 23 by pinion 44:.

Operation: The truck 10 on which the apparatus is mounted may be movedfrom place to place in the room as the work progresses. Without movingthe truck the flexible connection between the tool-carry ing shaft andthe driving shaft 13 on the truck allows the former very considerableamplitude of movement. The operator manipulates the tool by taking holdof the hand grips 36. Where springs 39 are interposed between the handgrips and the easing supporting the tool (which is the way I prefer toconstruct the machine), the work of manipulating the tool is facilitatedboth in polishing fiat surfaces and-also the curved or cove base surface19 between the wall and the floor since the tool will adjust itself tothe surface on which it operates so that the workman does not have to beso carefulto keep the polishing surface of the tool inexact alinementwith the wall or floor surface operated upon. Moreover, thesespringsreduce vibration. The rounding of the tool at the end permits thepolishing of a cove base such as indicated at 19 in Fig. 1. Thesurfacing tool 16 may be readily removed when worn outvand a new toolsubstituted.

I claim:

1. In apparatus 6f the 'character described,

ing in which said tool-carrying shaft is revolubly mounted, handles onsaid casing,

and a polishing tool on said tool-carrying shaft generally cylindricalin form and withits outer end rounded.

3. In apparatus of the character described, the combination of a movableplatform, a motor mounted on said platform, a-shaft driven by saidmotor, flexible shafting connected with said driven shaft, atool-carrying shaft driven by the flexible shaft, a casing in which saidtool-carrying shaft is revolubly mounted, a tool holder rigid on saidtool-carrying shaft formed with a the combination of a movable platform,a

motor mounted on said latform, a shaft driven by said motor, flexibleshafting connected with said driven shaft, a tool-carrying shaft drivenby the flexible shaft, a casing in which said tool-carrying shaft isrevolubly mounted, a tool holder rigid on said tool-carrying shaftformed with a shoulder, a polishing tool generally cylindrical in formwith its outerv end rounded and formed with a recess which is arrangedupon said tool holder, means located within said recess for binding thetool between said shoulder and the end of the tool-carrying shaft, studson said casing, handles slidably mounted on said studs, and springsinterposed between the handles and the casing.

5. In apparatus of the character described, the combination of a movableplatform, a motor mounted on said platform, a shaft driven by the motor,a tool carrying shaft, a polishing tool having-a generally cylindricalpolishing surface mounted on the outer end of said tool carrying shaftso as to i'evolve.therewith, a casing in which the inner end of the toolcarrying shaft is revolubly supported and which is provided withlaterally extending means whereby the tool may be handled by theoperator, and flexible shafting operatively connecting said motor drivenshaft with the tool carrying shaft.

ANTONIO G. FERRARINI.

Witnesses:

L. A. FALKENBERG, R. KUEHN.

